421804440429 has 8 divisors (see below), whose sum is σ = 563972512320. Its totient is φ = 280419664416.

The previous prime is 421804440403. The next prime is 421804440439. The reversal of 421804440429 is 924044408124.

421804440429 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 421804440429 - 2⁵ = 421804440397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421804440439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195822712 + ... + 195824865.

It is an arithmetic number, because the mean of its divisors is an integer number (70496564040).

Almost surely, 2^421804440429 is an apocalyptic number.

It is an amenable number.

421804440429 is a deficient number, since it is larger than the sum of its proper divisors (142168071891).

421804440429 is a wasteful number, since it uses less digits than its factorization.

421804440429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391647939.

The product of its (nonzero) digits is 294912, while the sum is 42.

The spelling of 421804440429 in words is "four hundred twenty-one billion, eight hundred four million, four hundred forty thousand, four hundred twenty-nine".